QT Libraries Not Found

[Andomar]

Hello all,

Trying to compile KDevelop on Slackware 4.
The configure script says it can't find QT.
Even when I pass the directory with --with-qt-dir=/usr/lib/qt
My version is 1.44 which should be ok according
to the configure script.
I downloaded QT and compiled it into /usr/local/qt,
but still configure would refuse to accept it.

Does anyone have a clue why the configure script
keeps balking?  Is there a way to "force" it to try
and compile with /usr/lib/qt ?

Sorry if this is an obvious question.

Greetings, Andomar.